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中文摘要：
在总结国内外振动台试验用土箱的基础上，研制了一个15层叠层方钢管框架并辅之以双侧面钢板约束的叠层剪切型模型土箱，钢管框架层间相对运动和垂直振动方向两边界的自由运动大大削弱了土箱边界效应。平行振动方向土箱两侧安装4根立柱，立柱上安装与土箱侧壁接触的若干轴承以限制箱内土体的转动。采用正弦波激振的扫频法测量了模型土箱的自振频率，与ABAQUS软件模拟的计算结果基本一致；采用脉冲信号激振的自由振动法，测量了土箱的阻尼比：进行了正弦波和地震波激励的自由场地振动台试验研究，测试了模型地基地表和1m深处的加速度时程，提出边界效应指数作为衡量土箱边界效应的指标并对几种土箱进行了比较。结果表明：设计的叠层剪切型土箱能较好地模拟自由场地的边界条件，比较理想地削弱了边界上地震波的反射或散射效应。
英文摘要：
Based on the investigation of the shaking table tests at home and abroad, a laminar shear container is designed. The developed laminar box is a large-size shear box consisting of fifteen horizontal layers made of steel tubes. Each layer has an external dimension of 3.7 m by 2.2 m in size and 0.1 m in thickness. The layers can move relatively to one another in accordance with the deformation of the soils inside. The boundary effects will also be weakened considerably because of the free movement of two boundaries. On the two side faces parallel to the vibration direction, the four upright columns are installed. Several shafting bearings on each column are all contacted with the side face of the box. The rotation of the soils will be limited. And then, the container is evaluated by comparing the measured acceleration records in free field under simple harmonic waves and seismic excitations. A statistical index is presented to evaluate and compare the boundary effects of several kinds of soil containers. The results show that the developed laminar shear soil container is successful in simulating the soil boundary condition. It is an ideal container to weaken the reflection and scattering effect of waves on the boundaries.
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